If the Soul-Severing Seal was used improperly, it would inflict irreparable damage on the recipient's Primordial Spirit, while also greatly reducing Di Kun's strength. Before cultivating the Soul-Severing Seal to a certain level, Lu Xiaotian did not dare rashly cast it on Di Kun's Primordial Spirit.
Condensing the Soul-Severing Seal consumed a tremendous amount of mana and divine sense. The consumption was especially great at the beginning, when the process was exceedingly obscure. After practicing for only two hours, even Lu Xiaotian, with his cultivation and powerful divine sense, felt tired. He stopped to take some pills, then continued practicing after recovering somewhat.
The cave here was relatively cramped, so Lu Xiaotian did not conceal his cultivation from Ge Changting and Xiao Sanniang. From time to time, the two would glance over to see what he was practicing. At first, when they saw Lu Xiaotian form hand seals and condense a gray, profound mark in his palm, they did not think much of it.
Later, Lu Xiaotian's hand-seal changes grew faster and faster. His fingers became nothing more than indistinct afterimages, while the circular gray mark grew increasingly clear. Just one glance at it seemed to make them feel their own memories slipping away. The two exchanged horrified looks, then hurriedly lowered their heads, no longer daring to watch Lu Xiaotian practice this bizarre technique.
In fact, condensing the Soul-Severing Seal took a very long time—half a year at the fastest, several years at the slowest. It was possible to pause briefly in the middle, but the interruption could not last too long. Otherwise, the condensed gray, profound mark would collapse when the mana was cut off, rendering all previous efforts useless. At the beginning, because he was unfamiliar with the hand seals or encountered something too difficult to comprehend,